Biju Patnaik University of Technology 2008-5th Sem M.C.A Computer Networks - Question Paper

(c)    What do you mean by bit-oriented protocol ?

(d)    What Is plaintext and ciphertext ?

(e)    Name any two network layer protocols.

(f)    Explain the function of transport layer.

(g)    Explain the meaning of subnet relating to internetworking,

(h)    What is the protocol used for connecting wireless LANs ?

(i)    List the multiplexing techniques used in computer networks.

(j) Deduce the number of extra bits required to transmit a message comprising one hundred S-bit characters over a data link using Asynchronous transmission with one start bit and two stop bits per character and a single start-of-frame and end-of-frame character per message.

2,    Use example waveform sets to frustrate the main features associated with following encoding schemes :

AMI, B0ZS, HDB3, Manchester

Comment on relative advantages of each scheme.    ig

3,    Generate the CRC code for the message 11100110 using the generator polynomial 11001. Show how it helps in error detection. 10

4,    With the aid of frame sequence diagram and assuming a go-back-N error control scheme, describe how the following are overcome :

10

(a)    A corrupted Information frame

(b)    A corrupted ACK frame.

5,    List the types of network topology used for LANs and with the aid of sketches, explain their operation.

PCS 5009 -    3    P-T.O.